Revelation 9:13-15

Young's Literal Translation

¹³ And the sixth messenger did sound, and I heard a voice out of the four horns of the altar of gold that is before God,

¹⁴ saying to the sixth messenger who had the trumpet, `Loose the four messengers who are bound at the great river Euphrates;'

¹⁵ and loosed were the four messengers, who have been made ready for the hour, and day, and month, and year, that they may kill the third of men;